Sound: the Speed of Sound

The video explores factors influencing the speed of sound, emphasizing that sound speed is determined by the medium, not the source. It highlights that sound travels faster in warm air due to faster molecular movement. Examples are given comparing sound speed on a winter day at 0°C (331 m/s) and a summer day at 25°C (346 m/s). Temperature is a key factor, but not the only one affecting sound speed.

What determines the speed at which sound waves travel?

• The medium through which the sound travels

• The pitch of the sound

• The volume of the sound

• The type of instrument producing the sound

Why do sound waves travel faster in warm air compared to cold air?

• Warm air has more sound waves

• Cold air absorbs sound waves

• Sound waves are lighter in warm air

• Molecules move faster at higher temperatures

At what speed does sound travel on a winter day when the temperature is 0 degrees Celsius?

• 300 meters per second

• 331 meters per second

• 360 meters per second

• 346 meters per second

How fast does sound travel on a summer day when the temperature is 25 degrees Celsius?

• 350 meters per second

• 346 meters per second

• 340 meters per second

• 331 meters per second

Is temperature the only factor that affects the speed of sound?

• Yes, it is the only factor

• It depends on the time of day

• No, there are other factors

• Only in certain conditions